Interactive effects of light quality and nitrate supply on growth and metabolic processes in two lettuce cultivars (Lactuca sativa L.)

Liang, Ying; Dong, Yuchen; Yang, Qichang; Urano, Daisuke; Wang, Zheng

doi:10.1016/j.envexpbot.2023.105443

Cited by 6 publications

(2 citation statements)

References 61 publications

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“…Maintaining nitrate levels of leafy vegetables under a certain threshold, defined by the European Commission between 2000 and 5000 mg of nitrate per kg of fresh weight depending on the crop and the season [12], has been a clear goal of growers and plant scientists [96][97][98][99]. Even though the leaf nitrate content can be reduced through an increase in light intensity, photoperiod, or both, the chemical composition of the nutrient solution plays an important, if not primary, role [29,[100][101][102][103]. Limited nitrogen is known to negatively affect plant growth [104,105].…”

Section: Biostimulant Application Could Not Counteract the Effects Of...mentioning

confidence: 99%

Innovative Cultivation Practices for Reducing Nitrate Content in Baby Leaf Lettuce Grown in a Vertical Farm

Voutsinos-Frantzis,

Savvas,

Antoniadou

et al. 2024

Horticulturae

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The aim of this research is to introduce innovative cultivation practices that result in reduced nitrate levels in baby leaf lettuce grown under vertical farming conditions while maintaining high productivity. For this reason, three experiments were conducted. The first experiment focused on the impact of two “white” light spectra with a blue:green:red:far-red ratio of 14:32:43:10 (BlowRhigh) and 21:34:36:7 (BhighRlow). The second experiment assessed the effects of two nitrogen supply conditions: sufficient total nitrogen (N15) and limited total nitrogen (N5), and foliar biostimulant application. In the third experiment, the impact of replacing the nutrient solution in the N15 treatment with tap water for an additional 24 h (TW24) on leaf nitrate content was examined. Results from the lighting experiment revealed no significant effects on agronomical parameters or nitrate content between the two light spectra. Reducing nitrogen content in the nutrient solution reduced leaf nitrate content but negatively influenced agronomical characteristics. Biostimulant application and replacing the nutrient solution with water reduced leaf nitrate content compared to the control and positively affected growth. The most favorable outcomes were observed in plants supplied with sufficient nitrogen and foliar biostimulant but also cultivated for an additional 24 h with tap water (Sp-N15-TW24).

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Section: Biostimulant Application Could Not Counteract the Effects Of...mentioning

confidence: 99%

Innovative Cultivation Practices for Reducing Nitrate Content in Baby Leaf Lettuce Grown in a Vertical Farm

Voutsinos-Frantzis,

Savvas,

Antoniadou

et al. 2024

Horticulturae

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“…Numerous studies have shown the impacts of light intensity and duration on the growth, biomass, pigment content, photosynthetic rate, and stress response of garden lettuce (Lactuca sativa L.) leaves [8,9]. Light quality (such as blue, green, and red) also has different impacts on the metabolic and transcriptional reprogramming of garden lettuce leaves [10,11]. The optimal light quality and intensity for garden lettuce growth depend on the cultivar and the environmental conditions [10].…”

Section: Introductionmentioning

confidence: 99%

Light Intensity Modulates the Functional Composition of Leaf Metabolite Groups and Phyllosphere Prokaryotic Community in Garden Lettuce (Lactuca sativa L.) Plants at the Vegetative Stage

Kong,

Ye,

Dai

et al. 2024

IJMS

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Light intensity primarily drives plant growth and morphogenesis, whereas the ecological impact of light intensity on the phyllosphere (leaf surface and endosphere) microbiome is poorly understood. In this study, garden lettuce (Lactuca sativa L.) plants were grown under low, medium, and high light intensities. High light intensity remarkably induced the leaf contents of soluble proteins and chlorophylls, whereas it reduced the contents of leaf nitrate. In comparison, medium light intensity exhibited the highest contents of soluble sugar, cellulose, and free amino acids. Meanwhile, light intensity resulted in significant changes in the composition of functional genes but not in the taxonomic compositions of the prokaryotic community (bacteria and archaea) in the phyllosphere. Notably, garden lettuce plants under high light intensity treatment harbored more sulfur-cycling mdh and carbon-cycling glyA genes than under low light intensity, both of which were among the 20 most abundant prokaryotic genes in the leaf phyllosphere. Furthermore, the correlations between prokaryotic functional genes and lettuce leaf metabolite groups were examined to disclose their interactions under varying light intensities. The relative abundance of the mdh gene was positively correlated with leaf total chlorophyll content but negatively correlated with leaf nitrate content. In comparison, the relative abundance of the glyA gene was positively correlated with leaf total chlorophyll and carotenoids. Overall, this study revealed that the functional composition of the phyllosphere prokaryotic community and leaf metabolite groups were tightly linked in response to changing light intensities. These findings provided novel insights into the interactions between plants and prokaryotic microbes in indoor farming systems, which will help optimize environmental management in indoor farms and harness beneficial plant–microbe relationships for crop production.

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Transcriptomics combined with physiology reveals the effect of different light qualities on the development of Fritillaria cirrhosa in the Qinghai Tibet Plateau

Yang,

Wang,

Wang

et al. 2024

Environmental and Experimental Botany

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Interactive effects of light quality and nitrate supply on growth and metabolic processes in two lettuce cultivars (Lactuca sativa L.)

Cited by 6 publications

References 61 publications

Innovative Cultivation Practices for Reducing Nitrate Content in Baby Leaf Lettuce Grown in a Vertical Farm

Innovative Cultivation Practices for Reducing Nitrate Content in Baby Leaf Lettuce Grown in a Vertical Farm

Light Intensity Modulates the Functional Composition of Leaf Metabolite Groups and Phyllosphere Prokaryotic Community in Garden Lettuce (Lactuca sativa L.) Plants at the Vegetative Stage

Transcriptomics combined with physiology reveals the effect of different light qualities on the development of Fritillaria cirrhosa in the Qinghai Tibet Plateau

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